Guys, just as a FYI-- when looking at the parts list/manuals for the AVIC-D2 vs AVIC-D1 the Gyro sensor is different in the D1 then it is in the D2.
D1 Gyro Sensor # GY551
D2 Gyro Sensor # GY555
Theres a few other minor internal differences--but thought I'd just throw that out there.
Chris.